Detector



W. NANFELDT May 5, 1931.

DETECTOR Filed Oct. 5, 1928 2 SheetsSheet INVENTOR Aha/F5407 I v v ATTORNEY WALL/AM May 5, 1931. w. NANFELDT 1,803,724

DETECTOR Filed Oct. 5, 1928 2 Sheets-Sheet 2 ATTORNEY Patented May 5, 1931 umrsnsrarss FATE-NIT? OFFICE WILLIAM N ANFELDT, OF PATERSON, NEW JERSEY, ASSIGNOR TO WORLD IBESIOS GOR- PORATION, F PATERSON,-1\TEW JERSEY, A CORPORATION OF DELAWARE nnzrncron Application filed October 5, 1928. Serial No. 310,461.

This invention relates to yarn Winding machines, and particularly to a detector for finding certain imperfections in the yarn to be wound and incorporating means to stop the operation of such a machine when an im' perfection occurs.

' The invention has been used in connection with asbestos yarn as described in my copending application, Serial No. 202,796, filed July 1st 1927, in which an asbestos paper material is wrapped about a core of cotton string and a pair of fine wires twisted around the outside to hold the paper in a compact form about the core. In this application the method of manufacturing the yarn is shown and described, such a method being to form the asbestos paper strip about the core and twist the reinforcing wires simultaneously thereabout as all of the elements are drawn through a guide. It sometimes occurs in the manufacture of this yarn that the paper stripbecomes exhausted or breaks, with the result that the elements continue to feed through the die without the paper strip.

7 It has been found expedient when" this happens to merely start another length of paper strip into the machine without cutting the wires or core or starting the machine over again. This results in a length of yarn being Wound upon-a spool, in many instances, minus the paper strip, and therefore comprising only the core material and the reinforcing wires. After the yarn is wound upon spools, thesespools arev placed in winding machines Which rewind'it ready for use in the looms. It is necessary in this rewinding process to stop the machine and correct any irregularity or defect in the yarn so that the yarn can pass through the loom without necessitating any shutdown of the loom to correct such defects. In order to locate the defect in the yarn caused by a lack of asbestos material therein, the present invention has been devised. I

It is therefore one of the objects of the inventionto provide a device to be attached to a winding machine which will cause an 1 automatic stopping of the machine when the yarn passing through .the machine is materially decreased in diameter.

Other objects of the invention will be parent as the description thereof proceeds.

One embodiment of the invention has been illustrated in the accompanying drawings, in which 7 Fig.1 is a side view of a winding machine equipped with the invention;

Fig. 2 is a detailed view of the grooved pulley forming part of the invention;

Fig. 3 is an end view of the machine shown in'Fig. 1; and V Fig. 1 is a detail of a portion of the machine shown in Fig. 3 when the device is op erating to stop the machine.

. Referring now more specifically to the drawings, the invention is shown in connection with a winding machine which comprises a frame 10 on which is mounted a winding shaft 11 rotating inbearings 12 and to which is attached the pulley 13. pulley is adapted to be driven by a belt 1 1 from another constantly driven pulley (not shown) located somewhere near the base of the machine. An idler pulley 15 is rotatably mounted on the shaft 11 adjacent the pulley 13, and the machine may be stopped by moving'the belt 14 over to the idler pulley 15,'as is normallydone for starting and stopping machines driven from a main power shaft. j

r In order toeffect the movement of the belt 14 an arm 16 is pivotally mounted on the frame of the machine and has a U-shaped end, the sides of which are adapted to be positioned' adjacent the sides of the belt. A second arm 17 is also pivotally mounted on the frame 10 as upon a shaft 17 a which may have a hand engaging member 18 extending upwardly from the pivot point, and pivoted to the arm 17 is a link'19 which pivotally connects with the'belt moving arm 16. A spring 20 attached between a portion of the frame and the arm 16 tends to move the arm16 so as to cause the belt 14 to move onto the idler pulley 15, thereby stopping the machine. The lower end of the arm 17 is extended considerably below the connection of the link 19 and has at its extreme end a latch 21 which is adaptedto catch over the lug 22 mounted This on the end of a lever 23 which is pivoted at 245 on the frame of the machine. The end of the lever 23 beneath the lug 22 is weighted by an extension to form a means to more evenly balance the lever 23 which extends in the opposite direction from the pivot 24: to an elbow 26 which has a cam member 2'? e. tending outwardly from the end thereof. Vhen the lower end of the lever 17 is brought toward the lever by pushing the hand operated member 18, the latch 21 passes over the lug 22 which has a sloping surface 28 to permit the latch 21 to pass over it, and the weight of the elbow 26 causes the lever 23 to rotate in a counter-clockwise direction, thereby engaging the latch 21 and holding the lever 17 in such a position that the belt 14 is running upon the pulley 13 and driving the machine.

The yarn is fed from a supply (not shown) through a loop 29 attached to the frame of the machine, over a roller 30 rotatably mounted on an arm 31 also attached to the frame of the machine, through a loop 32 of wire which is movably mounted in a manner to be described hereinafter, over a pulley comprising the principal feature of the invention, and through a guide member 33 which is caused to move backward and forward as the yarn is wound to wind it upon a core 34: in the manner customarily employed for winding yarn used in weaving looms.

The loop 32 is mounted upon a curved arm 35 which is pivoted to the frame of the machine at 36. The wire loop may be attached to the arm by inserting the end of the loop in a bore in the end of the arm and tightening the lock bolt 37 which is threaded into the arm and is adapted to enter the side of the bore, thereby securing the loop. Adjacent the pivot 36 and forming part of the arm 35, is a cam member 38 which is adapted to engage the cam member 27 on the lever 23 and lift it, under certain conditions, thereby rocking the lever in a clockwise direction and releasing the latch 21. The arm 35 is fitted with an extension weight 39 at one side of the pivot 36 which tends to cause the arm to move in a counter clockwise direction when not held in place by other forces.

As thus far described, the winding machine is similar in every respect with the ex ception of the pulley referred to above, to those already in use and the inner upper side of the loop is adapted. to bear against the yarn as the yarn is fed through the machine to hold the arm 35 in slightly raised position, as shown in Fig. 3, so that when the end of the yarn is reached the weight 39 on the arm 35 will cause it to rotate slightly in a counterclockwise direction, engaging the cam member 27' by the cam member 38, and rocking the lever 23 in a clockwise direction, which releases the latch 21 and causes the belt 14: to move to the idler pulley 15, the

belt being urged by the spring 20 acting against the belt shifting arm. 16.

Immediately above the loop .32 there is p0- sitioned a grooved pulley 40 which is freely rotatable on a shaft 11 mounted in a fixed position on the frame of the machine. This pulley 40 comprises two discs 42 and 13, as shown in Fig. 2, which have adjacent beveled edges 4 1 and 45, respectively, and which are separated slightly by a washer 4L6, so that the space between them is too small to permit the yarn to slip therebetween, but large enough to receive the core and reinforcing elements of the yarn without the asbestos paper. The grooved pulley 40 is placed in such a position as to be somewhat out of the direct line which would ordinarily be taken by the yarn through the machine, and in order to have this pulley offset in this manner it is necessary to also offset in the other direction the pulley 30 which may be readily done by rotating the arm 31 about its pivot 17 on the machine. A bolt 48 is provided to secure the arm 31 in position when proper adjustment has been attained. The yarn, in passing through the machine, then takes the path as indicated in Fig. 3, through the loop 29, over the pulley 30, through the loop 32 and over the grooved pulley 40 to the winding guide 33, above. If a portion of the yarn moves into the machine having the paper strip omitted. so that there is only the core string and the reinforcing wires, thevery much diminished thickness of the yarn permits it to slip between the discs 42 and 43 of'the grooved pulley 40 toward the axis of these pulleys, as indicated in Fig. 4:. l Vhen the yarn has thus moved slightly toward the center of the pulleys it engages the inner upper side of the wire loop 32, causing the loop to be moved to the left and the arm 35 to be slightly rotated in a counter-clockwise direction, thus raising the cam member 38 to engage the cam member 27, and releasing the latch 21, as before explained, thereby stopping the machine.

The machine having stopped, the operator may then remove the defective piece of yarn, attach the two loose ends together and start the machine again by pushing the hand engaging member 18, as already explained.

While I have described the invention in connection with asbestos yarn, it is evident that it is adapted to be used in any winding machine where it is desired to stop the machine due to an unusual reduction in thickness of the material being wound. I do not, therefore, desire to limit the invention to the specific construction shown and described, but to interpret it broadly, limited only by the scope of the appended claims.

Having thus described my invention, what I desire to claim is:

1. In a yarn winding machine a winding shaft, means to rotate said shaft, a contact member adapted to follow the path of the yarn through the machine, means. for rendering said machine inoperative to rotate said shaft by movement of said contact mem-. her out of its normal position, and means operable by a decrease in the diameter of said yarn for bodily shifting the path of the yarn through the machine to move said contact member. 7

2. In a yarn winding machine, a winding shaft, means to rotate said winding shaft, a loop adapted to be guided by the path of the yarn entering the machine, means for rendering said machine inoperative to rotate said shaft when said loop is moved out of its normal position, means normally maintaining the yarn passing through the machine in a fixed path, said means permitting a change in the path of the yarn when the diameter of the yarn decreases beyond a predetermined limit, whereby said loop will be moved from its normal position. 7

3. In a yarn winding machine, a winding shaft, means to rotate said shaft, means for guiding the yarn through the machine in a definite path, said means including a pair of members space-d apart a distance less than the normal diameter of said yarn, said members permitting the yarn to ride thereon, whereby said yarn may move between said members when the diameter thereof decreases beyond a predetermined limit to change the path of the yarn, a contact member engaging said yarn and guided by the path of the same, and means operable by movement of said contact member for stopping the machine.

4:. In a yarn winding machine, a winding shaft, means to rotate said shaft, a grooved pulley rotatably mounted on the machine and adapted to guide the yarn as it passes through the machine in a definite path, a slot extending centrally around the pulley and communicating with said groove whereby said yarn may enter the slot to change the path of the yarn when the diameter of the same is decreased beyond a predetermined limit, a contact member engaging the yarn and adapted to follow the path of the same whereby it will be moved when the path of the yarn is changed, and means for rendering the machine inoperative to rotate said shaft when said contact member is moved.

5. In a yarn winding machine, a winding shaft, means to rotate said shaft, means to stop rotation of said shaft, means cooperat ing with the yarn and adapted to follow the path of the same in passing through the machine to operate said stopping means upon movement by a change of pathof the yarn, a guiding member having a groove thereon in which yarn is adapted to ride mounted in the machine, there being a slot within said groove, saidslot being of such width that said yarn may not enter the same except upon a decrease in diameter thereof beyond a predetermined limit, whereby when said yarn enters said slot the path of the same may be changed and whereby said stopping means may be operated.

6. In a yarn winding machine a winding shaft, means to rotate said shaft, a grooved pulley rotatably mounted on the machine and position when the path of said yarn is changed, a lever adapted to stop the operation of said machine when moved in one direction, means to normally urge said lever in such direction, means normally holding said lever against movement in such direction, and means operable by movement of said contact member to release said holding means.

7 Ina yarn winding machine, a winding mechanism, an element guided by the path of the yarn through the machine and adapted to be displaced by lateral shifting movement of the yarn, means operable by displacement of the guided element for stopping said winding mechanism, and means for displacing the yarn laterally when the diameter of the same is decreased. p r

8. In a yarn winding machine, a winding mechanism, a guideelement for guiding the yarn through the machine having plural guide surfaces spaced from each other a distance less than the normal diameter of the yarn whereby the yarn will leave said surfaces and assume a different path when the diameter of the same is decreased. a member adapted to be moved by shifting of the path of the yarn, and means associated with the member for stopping said winding mechanism upon'movement thereof.

In testimony whereof, I afliX my signature.

IVILLIAM 'NANFELDT. 

